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Can you program a 4l80e for full manual control?

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Old Feb 17, 2014 | 12:16 PM
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Default Can you program a 4l80e for full manual control?

I know they sell boxes to control the 4l80 manually. But mine is already computer controlled. Im just looking to be able to force my shifts manually and launch in 2nd at the track. while still having lockup functionality as well as speedometer function.

Anyone know how to do this?
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Old Feb 17, 2014 | 01:44 PM
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www.summitracing.com/parts/TRG-4L80E-HD2/
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Old Feb 17, 2014 | 02:18 PM
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I already have that. it will downshift when moving, but still goes into 1st at a stop
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Old Feb 17, 2014 | 09:18 PM
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Manual valve body
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Old Feb 18, 2014 | 09:41 AM
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That^ I think RPM transmissions have those.
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Old Feb 18, 2014 | 10:50 AM
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Only way to get full electronic manual control is to use an external cintroller


I personally like the Powertrain control solutions Tcm-2000.

It has a speedo output and you can flip a switch to be in full manual or full auto mode... plus the ability to switch between 2 different shift strategies with another switch. (one for the track and one for the street)
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Old Feb 18, 2014 | 12:23 PM
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Originally Posted by cjmatt
I know they sell boxes to control the 4l80 manually. But mine is already computer controlled. Im just looking to be able to force my shifts manually and launch in 2nd at the track. while still having lockup functionality as well as speedometer function.

Anyone know how to do this?
Tune the mph tables to 0 in your performance mode.
You may need to tune rpm tables as well. That will force it to work off the shifter.
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Old Feb 18, 2014 | 12:37 PM
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Originally Posted by Jake's Performance
Tune the mph tables to 0 in your performance mode.
You may need to tune rpm tables as well. That will force it to work off the shifter.
This assumes you actually have a performance mode switch on your vehicle and enabled in the OS.
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Old Feb 18, 2014 | 01:03 PM
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Originally Posted by soundengineer
This assumes you actually have a performance mode switch on your vehicle and enabled in the OS.
Add a switch and enable it in the tune if not....
If he has the ability to tune it, neither should be a huge undertaking.
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Old Feb 18, 2014 | 03:07 PM
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IIRC the '99 through '02 PCMs will start a 4L60E in 2nd gear if the shifter is in [D2].
Might that also start a 4L80E in 2nd gear?
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Old Feb 18, 2014 | 03:29 PM
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Originally Posted by mrvedit
IIRC the '99 through '02 PCMs will start a 4L60E in 2nd gear if the shifter is in [D2].
Might that also start a 4L80E in 2nd gear?
Yes,
If you set it up that way in the tune, and also you can just zero out the 1-2 shift tables to cause it to launch in 2nd and then shift normally otherwise.

Lots of different methods to get there.
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Old Feb 18, 2014 | 04:33 PM
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i cant believe i forgot about that. 1st goes to 1st, 2nd starts in 2nd, and 3rd starts back in 1st for the 4l60 right? DOH!
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